[Gideon7]

The em dash (—) and the en dash (-) are two different symbols. The latter is on your keyboard; the former is not.

Using — is the red flag. Using - is normal.

[Dahoser]

The em dash (—) and the en dash (-) are two different symbols. The latter is on your keyboard; the former is not.

Crocodile Dundee moment: That's not an en dash (-). That's an en dash (–).

This is how they look against each other and what they're used for.

-	Compound words, continuation, phone numbers
–	Ranges A–Z, 24–72
—	Set off thoughts—an aside—in writing